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Rice husk as a pore-forming agent: impact of particle size on the porosity and diametral tensile strength of porous alumina ceramics

This study describes the porosity and particle size effects of rice husk pore former on the diametral tensile strength of porous alumina (Al2O3) ceramics. Porous Al2O3 ceramics with high porosity and sufficient diametral tensile strength were successfully prepared by the pore-forming agent method us...

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Main Authors: T. T., Dele-Afolabi, M. A., Azmah Hanim, D. W., Jung, R. A., Ilyas, R., Calin, A. R., Nurul Izzah
Format: Article
Published: MDPI 2022
Online Access:http://psasir.upm.edu.my/id/eprint/103102/
https://www.mdpi.com/2079-6412/12/9/1259
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spelling my.upm.eprints.1031022024-06-29T12:44:43Z http://psasir.upm.edu.my/id/eprint/103102/ Rice husk as a pore-forming agent: impact of particle size on the porosity and diametral tensile strength of porous alumina ceramics T. T., Dele-Afolabi M. A., Azmah Hanim D. W., Jung R. A., Ilyas R., Calin A. R., Nurul Izzah This study describes the porosity and particle size effects of rice husk pore former on the diametral tensile strength of porous alumina (Al2O3) ceramics. Porous Al2O3 ceramics with high porosity and sufficient diametral tensile strength were successfully prepared by the pore-forming agent method using rice husk (RH) as the pore former according to the sample formulation Al2O3-xRHy (where ‘x’ denotes the particle size range in µm and ‘y’ denotes the percent weight content (wt%) of RH). The thermogravimetric analysis (TGA) and X-ray diffractometer (XRD) results revealed that silica was retained as rice husk ash in the developed porous Al2O3 after the decomposition of the starting rice husk pore former. Microstructures of the as-prepared porous Al2O3 ceramics having different RH additions exhibited hierarchical pore structures with increased particle size of the pore-forming agent. Porosity increased with larger particle size range of rice husk where the Al2O3-63RH5 demonstrated the least porosity (44.2 vol%), while the highest porosity (70.9 vol%) was demonstrated by the Al2O3-125–250RH20. The diametral tensile strength of the RH-shaped porous alumina ceramics declined from 16.97 to 0.65 MPa with increased particle size of the rice husk. MDPI 2022 Article PeerReviewed T. T., Dele-Afolabi and M. A., Azmah Hanim and D. W., Jung and R. A., Ilyas and R., Calin and A. R., Nurul Izzah (2022) Rice husk as a pore-forming agent: impact of particle size on the porosity and diametral tensile strength of porous alumina ceramics. Coatings, 12 (9). art. no. 1259. pp. 1-12. ISSN 2079-6412 https://www.mdpi.com/2079-6412/12/9/1259 10.3390/coatings12091259
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
description This study describes the porosity and particle size effects of rice husk pore former on the diametral tensile strength of porous alumina (Al2O3) ceramics. Porous Al2O3 ceramics with high porosity and sufficient diametral tensile strength were successfully prepared by the pore-forming agent method using rice husk (RH) as the pore former according to the sample formulation Al2O3-xRHy (where ‘x’ denotes the particle size range in µm and ‘y’ denotes the percent weight content (wt%) of RH). The thermogravimetric analysis (TGA) and X-ray diffractometer (XRD) results revealed that silica was retained as rice husk ash in the developed porous Al2O3 after the decomposition of the starting rice husk pore former. Microstructures of the as-prepared porous Al2O3 ceramics having different RH additions exhibited hierarchical pore structures with increased particle size of the pore-forming agent. Porosity increased with larger particle size range of rice husk where the Al2O3-63RH5 demonstrated the least porosity (44.2 vol%), while the highest porosity (70.9 vol%) was demonstrated by the Al2O3-125–250RH20. The diametral tensile strength of the RH-shaped porous alumina ceramics declined from 16.97 to 0.65 MPa with increased particle size of the rice husk.
format Article
author T. T., Dele-Afolabi
M. A., Azmah Hanim
D. W., Jung
R. A., Ilyas
R., Calin
A. R., Nurul Izzah
spellingShingle T. T., Dele-Afolabi
M. A., Azmah Hanim
D. W., Jung
R. A., Ilyas
R., Calin
A. R., Nurul Izzah
Rice husk as a pore-forming agent: impact of particle size on the porosity and diametral tensile strength of porous alumina ceramics
author_facet T. T., Dele-Afolabi
M. A., Azmah Hanim
D. W., Jung
R. A., Ilyas
R., Calin
A. R., Nurul Izzah
author_sort T. T., Dele-Afolabi
title Rice husk as a pore-forming agent: impact of particle size on the porosity and diametral tensile strength of porous alumina ceramics
title_short Rice husk as a pore-forming agent: impact of particle size on the porosity and diametral tensile strength of porous alumina ceramics
title_full Rice husk as a pore-forming agent: impact of particle size on the porosity and diametral tensile strength of porous alumina ceramics
title_fullStr Rice husk as a pore-forming agent: impact of particle size on the porosity and diametral tensile strength of porous alumina ceramics
title_full_unstemmed Rice husk as a pore-forming agent: impact of particle size on the porosity and diametral tensile strength of porous alumina ceramics
title_sort rice husk as a pore-forming agent: impact of particle size on the porosity and diametral tensile strength of porous alumina ceramics
publisher MDPI
publishDate 2022
url http://psasir.upm.edu.my/id/eprint/103102/
https://www.mdpi.com/2079-6412/12/9/1259
_version_ 1803336813150994432
score 13.211869

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